AI agents use smart_edit to create or update resources in Code — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Code environment.
Based on naming context and sibling tools (edit_file, edit_block), smart_edit most likely modifies file contents reversibly, making it a Write operation. Severity is high because unintended file modifications in a project directory could corrupt code or configuration, though not irreversible like deletion.
From the tool's definition Tool named 'smart_edit' with sibling tools including 'edit_file' and 'edit_block' on a code management server. Server description states it 'perform[s] file operations' and tool name suggests editing capability.
Documented attack patterns abuse exactly the kind of access smart_edit gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Code, and nothing reaches the server without passing your rules. This is the rule we recommend for smart_edit:
{
"version": "1",
"default": "deny",
"tools": {
"smart_edit": {
"limits": [
{
"counter": "smart_edit_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}smart_edit stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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smart_edit. It is categorised as a Write tool in the Code MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Code MCP server in PolicyLayer and add a rule for smart_edit: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Code. Nothing to install.
smart_edit is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the smart_edit rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for smart_edit. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
smart_edit is provided by the Code MCP server (54yyyu/code-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 9 Code tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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9 Code tools catalogued and risk-classified — across an index of 42,500+ MCP servers.